eCite Digital Repository
Partitioning of the global fossil CO2 sink using a 19-year trend in atmospheric O2
Citation
Langenfelds, RL and Francey, RJ and Steele, LP and Battle, M and Keeling, RF and Budd, WF, Partitioning of the global fossil CO2 sink using a 19-year trend in atmospheric O2, Geophysical Research Letters, 26, (13) pp. 1897-1900. ISSN 0094-8276 (1999) [Refereed Article]
Abstract
O2/N2 is measured in the Cape Grim Air Archive (CGAA), a suite of tanks filled with background air at Cape Grim, Tasmania (40.7°S, 144.8°E) between April 1978 and January 1997. Derived trends are compared with published O2/N2 records and assessed against limits on interannual variability of net terrestrial exchanges imposed by trends of δ13C in CO2. Two old samples from 1978 and 1987 and eight from 1996/97 survive critical selection criteria and give a mean 19-year trend in δ(O2/N2) of -16.7 ± 0.5 per meg yr-1, implying net storage of +2.3 ± 0.7 GtC (1015 g carbon) yr-1 of fossil fuel CO2 in the oceans and +0.2 ± 0.9 GtC yr-1 in the terrestrial biosphere. The uptake terms are consistent for both O2/N2 and δ13C tracers if the mean 13C isotopic disequilibrium flux, combining terrestrial and oceanic contributions, is 93 ± 15 GtC ‰ yr-1. Copyright 1999 by the American Geophysical Union.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Geology |
| Research Field: | Mineralogy and Crystallography |
| Objective Division: | Environment |
| Objective Group: | Atmosphere and Weather |
| Objective Field: | Weather |
| Author: | Langenfelds, RL (Mr Raymond Leonard Langenfelds) |
| Author: | Budd, WF (Professor William Budd) |
| ID Code: | 17381 |
| Year Published: | 1999 |
| Web of Science® Times Cited: | 39 |
| Deposited By: | IASOS |
| Deposited On: | 1999-08-01 |
| Last Modified: | 2000-05-20 |
| Downloads: | 0 |
Repository Staff Only: item control page